________ is an unusual base found in the DNA of T4 phages.
What will be an ideal response?
Hydroxymethylcytosine
hydroxymethylcytosine
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Which of the following is a cause of drug-specific resistance in disease-causing organisms?
A) inappropriate hygiene B) nosocomial infection C) poor immunity D) indiscriminate nonmedical use of antimicrobials
Working with biosafety Level 3 agents requires:
a. U.S. Department of Agriculture (USDA) credentials and a postgraduate degree in microbiology or a related field. b. laboratory design features that control air movement. c. personnel to wear protective clothing and devices and enter a decontaminating chamber before leaving. d. workers to have blood samples routinely tested to rule out infection or contamina-tion.
In which of the following excretory tubule segments in mammals does about 65 percent of the water
from the filtrate get reabsorbed?
a. distal convoluted tubule b. Bowman's capsule c. descending segment of the loop of Henle d. proximal convoluted tubule e. ascending segment of the loop of Henle
a release of melatonin earlier in the evening
What will be an ideal response?